Pump-valve



(No Model.) I

P. 0. WILSON.

PUMP VALVE.

No. 418,101. Patented Dec. 24, 1889.

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UNITED STATES,

PATENT OFFICE.

F. OORTEZ WILSON, OF CHICAGO, ILLINOIS.

PUMP-VALVE.

SPECIFICATION forming part of Letters Patent No. 418,101, dated December24, 1889.

Application filed January 9, 1888- Serial No. 260,120- (No model.)

To all whom it may concern.-

Be it known that I, F. CORTEZ WILSON, of Chicago, in the county of Cook,and in the State of Illinois, have invented certain new and usefulImprovements in Pump-Valves;

and I do hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,in which- Figure 1 is a perspective view of the parts of my valveseparated from each other. Fig. 2 is a like view of the same whenunited; and Figs. 3 and 4 are sections of said valve upon a verticalcentral line, and show, respectively, the position of parts when thevalve is in position upon and when raised above its seat.

Letters of like name and kind refer to like parts in each of thefigures.

The design of my invention is to lessen the cost of the valves of pumpswhich are used for handling oil and other liquids in retail storesWithout lessening their efliciency or durability; to which end my saidinvention consists in the construct-ion and combination ofparts,substantially as and for the purpose hereinafter specified.

In the construction of my valve I employ a frame A, which has thegeneral form of a hollow cylinder, with peripheral lugs a and a or othersuitable devices for engagement with the body of a pump. The upper endof the frame A constitutes a valve-seat a, and has such horizontal widthas to adapt it for such purpose. Across the center of said frame at itssaid upper end extends a cross-bar a which at its longitudinal center isenlarged laterally and at such point isprovid'ed with a vertical openinga Upon the upper end of the frame A is placed a disk B, of leather,rubber, or other flexible material, which disk extends outward upon thevalve-seat a, and preferably is slightly smaller in diameter than thesame. Said disk or valve is provided with a central opening I), throughwhich and through the opening a in the cross-bar a is passed a pin 0,that is adapted to play loosely within said opening, and is provided atits lower end with a head c and at its upper end with an enlargement c,which operate to prevent dis placement. Upon the upper side of the valveB, at its center, is placed a metal disk D, which has its edge (1 curveddownward, so as to bear at such point only upon said valve. The centralportion of the upper face of said disk is preferably countersunk orrecessed, and within such recess is placed a plain round washerE,.which, together with said disk, fits so loosely upon the pin 0 as toenable it to move freely upon the same. The device is now complete andin use operates in the usual manner, the upward flow of liquid causingthe valve to rise from its seat, while against the downward passage ofliquid said valve closes down upon its seat and-effectually closes theopening through the frame. The valve-seat and cross-bar furnish asufficient under bearing for said valve, while the concave disk operatesto relieve the central portion of the same from 'undue pressure, sothat, while made from comparatively thin material, said valve is enabledto successfully withstand the required pressure and to act Withoutmaterial wear or injury.

The operative parts of the device are simple, easily constructed andplaced in or removed from position,and when in place cost but a fractionof the expense involved by the construction of ordinary valves of equalcapacity. In addition to these advantages the thinness and exceedingflexibility of the valve enable it to more readily yield to the upwardflow of a liquid and to open a larger passage for the same than would bepossible were a less flexible valve employed.

Having thus described my invention, whatI claim is 1. As an improvementin pump-valves, in combination with the valvestem, a flexible diskmounted loosely thereon, which at its edges is adapted to extend overand upon an annular valve-seat and has a central support, and a disk ofmetal which is placed upon the upper side at the center of said valveand operates to relieve such portion from downward pressure,substantially as an d for the purpose specified.

2. The hollow cylindrical frame provided upon its upper end with avalve-seat and a central cross-bar, the circular flexible valve placedupon and extending over the valve seat, the concave metal disk placedcentrally In testimony that I claim the foregoing I upon said Valve, andthe pin having an enhave hereunto set my hand this 10th day oflargementat its end passing through the Deeeinloer, A. D. 1887.

cross-bar, valve, and disk, said valve and F. CORTEZ WILSON. disk beingloosely mounted thereon, all com- Witnesses:

bined substantially as and for the purpose CHAS. P. RANDALL,

shown. GEO. LANDIS WILSON.

